<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
    <style>
        *{margin: 0;padding: 0}
        img{
            width: 240px;
        }
        .item{
            border: 1px solid #eee;
            padding: 20px;
            float: left;
        }
    </style>
</head>
<body>
    <div class="content">
        <div class="item">
            <img src="images/01.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/02.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/03.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/04.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/05.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/06.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/07.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/08.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/09.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/10.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/11.jpg" alt="">
        </div>
         <div class="item">
            <img src="images/12.jpg" alt="">
        </div>
    </div>
   <script>
        /* 1.一排能放置几张图片 */
        window.onload = function () {
            var ww = $(window).width();
            var itemWidth = $(".item").outerWidth();
            var num = Math.floor(ww / itemWidth);
            console.log(num)
            /* 2.将第一排的高度添加到一个数组中 */
            var heightArr = [];
            $(".item").each((index,item)=>{
                if(index<num){
                    var item = $(item).outerHeight()
                    heightArr.push(item)
                }else{
                    /* 3.从数组高度最小的地方添加图片 */
                    var minHeight = Math.min(...heightArr);
                    var minIndex = heightArr.indexOf(minHeight);
                    var offsetLeft = $(".item").eq(minIndex).offset().left;
                    $(".item").eq(index).css({position:'absolute',top:minHeight,left:offsetLeft});
                    /* 4.重新设置数组的最小高度 */
                    var height = $(".item").eq(index).outerHeight();
                    heightArr[minIndex] = minHeight+height;
                }
            })
            console.log(heightArr)
        }
    </script>
</body>
</html>